Also very important to make sure the slots on the mount are degreased.
Word of warning on the brown finish of the coupling rings. This is
applied as a slippery coat and over enthusiastic cleaning will remove it
and possibly make the diaphragm blades sluggish all by themselves.
___________________________________
John Hermanson | CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121 | www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html
Russ Butler wrote:
> NSURIT@xxxxxxx wrote:
>> If I have something worth fixing it goes to Camtech, however I just
>> received a 50mm f1.8 and the aperture blades will not move on at all and
>> also a
>> 28mm f2.8 that has slow aperture blades. Neither of these are lens upon
>> which I would pay to have a CLA. Any words of advice from those who have
>> traveled this road about traps to be aware of when opening these guys up?
>> What
>> method works best for getting the blades cleaned and working. I might
>> mention the the 28mm doesn't appear to have any oil on the blades. They
>> are
>> just really slow. Bill Barber
>
> I had really good luck on a 50/1.8 & 50/1.4.
>
> First I gently heated the lens with a hair dryer to see if gummed up
> lube might be the problem. It was on these two lenses as the blades were
> less sticky when warm.
>
> So I removed the base of the lens and applied some CRC QD Electronic
> Cleaner using very tiny "Microbrush" brushes I bought at a local hobby
> store. (The tips are ~1mm diam x 2mm long). iirc (it's been a few years)
> I just applied the "QD" a tad here and there to where I figured the lube
> had gummed up over the years, worked the blades and repeated a few
> times. The QD apparently redissolved &/or redistributed the original
> lubricant.
>
> Worked for me. YMMV.
>
--
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